K2 XL Cz2.5 Filter Media PREMIUM GRADE Moving Bed Biofilm Reactor (MBBR) for Aquaponics • Aquaculture • Hydroponics • Ponds • Aquariums by Cz Garden Supply (1 Gallon)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Aquaponics • Aquaculture • Hydroponics • Ponds • Aquarium use</li><li>100% PREMIUM QUALITY Virgin Polyethylene. Beware of sellers offering Recycled Material which can be TOXIC!!</li><li>15 mm x 10mm - 1 cubic foot of media covers nearly 500 square feet of surface area</li><li>Colonize beneficial bacterial for hydroponically grown plants</li><li>Only available from Cz Garden Supply (TM); USPTO and Amazon Brand Registry Protected</li></ul></div><img src="http://ecx.images-amazon.com/images/I/61B%2Bx9Is14L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/414bbXsTAAL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51-J6TGNTAL.jpg" noproxy>